SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9a82e5b0d6d50348742afcdeca8fb88fd4d19950626d7f03d4f1ca6034d2ff84' 
  AND token = 'tGgwvgS83d0P2RLzlxXjchx8DBKiV5PFNM7T4CSCusA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}